US PATENT SUBCLASS 521 / 51
.~.~ Processes of preparing a cellular product having an integral skin

Current as of: June, 1999
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521 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
51.~.~ Processes of preparing a cellular product having an integral skin

DEFINITION

Classification: 521/51

Processes of preparing a cellular product having an integral skin:

(under subclass 50) Subject matter involving a process of preparing a cellular product having an integral skin.

(1) Note. An integral skin is defined as a surface layer of increased density as compared with a central core or layer, and which skin is formed contemporaneously with the central core or layer and from the same cell forming ingredients.

SEE OR SEARCH CLASS

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

45.1+, for multi-step processes of forming cellular product having an integral skin, or for processes of forming a product having an integral skin involving a significant molding or shaping step.

428, Stock Material or Miscellaneous Articles, in particular

212+, and 304.4+ for a cellular product having an integral skin.